The most efficient chiller for your project
In Australia we commonly use 2 global Institutions who provide standards for rating and testing full load and part load performances for chillers. They are the U.S based Air-conditioning Heating & Refrigeration Institute and Europe’s Eurovent Certification programme. These 2 institutions both provide methods of rating/testing chillers for the purposes of ensuring chillers perform within set tolerances.
These certification programmes provide a framework for various federal government driven efficiency programmes, “Minimum Energy Performance Standards”(MEPs), also the basis for compliance with the National Construction Code 2019 section J5.10. These certification programmes both assume “Typical” sets of circumstances. AHRI “IPLV” assumes standard chilled water and condenser water/air temperatures and a standard 4-point operating part load profile, “NPLV” is the same part load profile at your project water/air temperatures. As there are 4 defined points this provides a method for factory performance testing to prove the selected chiller performs as it should within AHRI tolerances. “NPLV” is the more useful of the 2 because it at least represents the correct project operating conditions if not the correct load profile. Eurovent’ s SEER represents “Seasonal Energy Efficiency Ratio” This is the amount cooling capacity required over a typical season dived by the electrical energy required to produce that capacity. It is a typical building with a typical weather profile.
What neither of these certification programmes do is assure you that you have the correct most efficient selection for your project.
The only way to do that is to match your building load profile to the most efficient chiller load profile. In the case of a new building that can be modelled and matched through computer software. In an existing building it is a lot more difficult to establish. It is often worth installing measuring and monitoring equipment so you can model you actual build your actual building profile over a full 12-month period.
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